
You see, it is very difficult to conduct a study which requires the academic scrutiny to pass accepted standards to be considered reliable and thus there has never been one!
But let me reassure you that , in my 30 odd years of practicing dentistry, seeing about 3000 patients at check-ups per year , close to 100,000 check-ups – the flossers have the best gums, least amount of bad breath and bleeding, and the least cavity activity.
Now that may not be an official study but that is a huge observation which in my eyes is irrefutable!